20以内的连加 (1)8 + 9 + 2 = (2)2 + 2 + 14 = (3)1 + 13 + 1 = (4)6 + 3 + 1 = (5)9 + 1 + 9 = (6)2 + 4 + 3 = (7)1 + 10 + 8 = (8)2 + 6 + 7 = (9)10 + 3 + 2 = (10)6 + 3 + 8 = (11)4 + 15 + 1 = (12)10 + 1 + 5 = (13)9 + 2 + 3 = (14)1 + 14 + 3 = (15)1 + 10 + 5 =
20以内的连减 (1)9 - 5 - 1= (2)11 - 8 - 2= (3)8 - 4 - 3= (4)14 - 2 - 3= (5)7 - 2 - 2= (6)19 - 12 - 1= (7)17 - 1 - 11= (8)18 - 1 - 14= (9)14 - 6 - 5= (10)9 - 6 - 2= (11)17 - 16 - 1= (12)19 - 7 - 1= (13)12 - 6 - 4= (14)8 - 1 - 5= (15)11 - 2 - 8=
20以内的加减混合 (1)1 - 1 + 16= (2)18 + 1 - 7= (3)1 + 9 - 3= (4)8 - 2 + 1= (5)1 + 7 - 5= (6)7 + 8 - 5= (7)13 - 4 + 10= (8)9 + 5 - 12= (9)6 + 10 - 7= (10)11 - 9 + 1= (11)5 + 4 - 8= (12)9 + 1 - 2= (13)7 + 10 - 5= (14)9 + 7 - 2= (15)19 - 19 + 18=20以内的连加连减混合 (1)1 + 14 + 1 = (2)9 - 6 - 1= (3)1 + 15 + 3 = (4)4 + 4 + 6 = (5)10 + 1 + 6 = (6)17 - 13 - 3= (7)6 - 4 - 1= (8)1 + 4 + 4 = (9)10 + 4 + 5 = (10)1 + 2 + 5 = (11)9 + 1 + 6 = (12)4 + 1 + 10 = (13)2 + 7 + 10 = (14)9 - 7 - 1= (15)5 + 4 + 3 =